5 Common Tax Filing Mistakes Maryland Residents Should Avoid

Introduction

Tax season in Maryland can be stressful, as even minor missteps can result in additional taxes, delayed refunds, or correspondence from the Comptroller of Maryland. Fortunately, most Maryland income tax errors are preventable. This guide details five key Maryland tax filing mistakes and provides actionable advice to help you keep more of your hard-earned money.

Choosing the Wrong Filing Status or Overlooking Dependents

Your filing status determines your tax rate and eligibility for numerous Maryland credits. Selecting the wrong status often leads to higher taxes or reduced refunds. Typical errors include new residents filing as “Single” after marriage, blended families missing stepchildren as dependents, or recently divorced individuals mistakenly filing as “Married Filing Jointly.” These errors can result in IRS notices and Maryland state issues.

Reexamine major life events such as marriage, divorce, adoption, or supporting elderly parents before e-filing. Use the IRS interactive tool, but verify Maryland-specific details like the Head of Household standard deduction, which is $6,700 for joint filers in 2025. Consult a tax professional familiar with Maryland law to ensure accuracy. Jones Tax E Service’s fourteen years of regional expertise helps identify and fix these errors before you submit your return.

Failing to claim eligible dependents or using the wrong status is a frequent cause of Maryland income tax errors, but one that is easily corrected with timely guidance.

Missing Out on Maryland-Specific Deductions and Credits

Maryland offers a variety of state tax breaks, but many filers miss valuable deductions and credits each year. Commonly overlooked benefits include the Maryland Earned Income Credit, which is now up to 50 percent of the federal amount due to the expanded “Earned It” campaign, a pension exclusion up to $36,200 for 2025, contributions to Maryland 529 college savings plans, local property tax credits based on income or disability, and deductions for student loan interest or apprenticeship expenses.

Missing even one deduction can cost hundreds or thousands of dollars, especially as local income tax rates can reach 3.30 percent and a new 2 percent capital-gains surtax affects high earners.

Gather your year-end documents early, including Form 1098-E for student loans, 529 confirmations, and real estate tax bills. Maintain a list of Maryland-only incentives in your tax planning documents. Work with a tax professional who understands these regional details. Jones Tax E Service’s multi-state experience ensures clients claim every available benefit, unlike generic tax software that may overlook Maryland-specific rules.

Math Errors, Mismatched Figures, and Documentation Gaps

Even with tax preparation apps, math errors remain a leading cause of delays and Maryland tax penalties. A transposed W-2 wage or a missing 1099-NEC can hold up your refund, despite processing time improvements by the Comptroller of Maryland.

Examples include entering $54,321 instead of $45,321 for wages, reporting mortgage interest without attaching the state copy of Form 1098, or failing to include required state forms like Form 505 for pension exclusions. These mistakes often require amended returns.

Organize your documents in labeled folders for W-2s, 1099s, and receipts. Use cloud backups and take smartphone photos of paper forms as they arrive. A tax professional can check for discrepancies between federal and state entries. Jones Tax E Service’s triple-check process nearly eliminates math errors and documentation gaps.

Forgetting Signatures, Social Security Numbers, or Bank Details

Unsigned tax forms or missing Social Security numbers are frequent and costly mistakes. A return without both signatures on a Married Filing Jointly return will be rejected by both the IRS and Maryland. Incorrect bank account numbers can delay direct deposit refunds by weeks.

Automatic rejection and possible late filing penalties may occur if resubmission happens after April 15. Incomplete ID fields can trigger audits. Paper checks may take four to six weeks, compared to three-day direct deposits.

Run a final checklist to ensure all names match Social Security cards and bank details are correct. Digital review platforms can flag unsigned forms. If you require notarized power of attorney or signature verification, Jones Tax E Service offers in-office and mobile notary services.

Even minor oversights can disrupt Maryland tax compliance, making diligent review essential.

Late Filing and Maryland Tax Compliance Pitfalls

Procrastination can result in significant penalties—late filing penalties in Maryland can reach 25 percent of unpaid taxes plus 13 percent annual interest. County surcharges may increase the overall cost.

Key deadlines:

• Jan 15 – Fourth estimated payment due (for self-employed or side gig income)
• Apr 15 – Individual return due (file Form 502, pay balance)
• June 15 – Extension filers’ first payment (interest accrues on unpaid tax)
• July 1 – New 3 percent sales tax on technology services begins (review invoices)
• Oct 15 – Extension return deadline (no further postponement)

Common pitfalls include missing estimated payments after freelance work, not amending returns when federal changes impact your Maryland filing, and overlooking local surcharge increases. Proactive planning is crucial. Jones Tax E Service provides year-round reminders, estimated payment coaching, and mid-year checkups, helping clients avoid surprises. DIY tax apps often lack these supports.

Spread out your cash flow with quarterly payments, prevent interest charges that may erase investment gains, and keep paperwork organized for mortgage or FAFSA applications.

What Sets Jones Tax E Service Apart

Maryland residents repeatedly choose Jones Tax E Service for several reasons. Fourteen years of regional experience provide insight into county rates, pension exclusion rules, and reciprocity with other states. A mobile notary option allows for secure signatures anywhere, ideal for elderly clients or military families. Ongoing professional education ensures up-to-date expertise on new tax brackets and surtaxes.

Notable advantages include:

• Fourteen years of regional experience: Deep knowledge of changing county rates and pension rules.
• Mobile notary option: Secure signatures at home or on the go.
• Ongoing professional education: Up-to-date on new brackets and capital-gains surtax.
• Personalized, detail-oriented process: Triple-checks for math errors or incorrect filing status.
• Year-round support: Quarterly reminders and fast answers to Comptroller letters.

Choosing the right tax preparer means having an ally who anticipates Maryland tax penalties before they occur.

Stay Ahead of Maryland Tax Mistakes

Protect your finances by avoiding the five most common Maryland tax filing mistakes: incorrect filing status, missing Maryland-specific deductions, math or documentation errors, incomplete signatures or bank details, and late filing. Jones Tax E Service offers local expertise and personal attention to help you prevent Maryland income tax errors and secure your refund. Ready for a smooth tax season? Drop in your queries today!

References