According to search results, the most common mistakes when filing your taxes are:

1. Mathematical errorsThe most common errors are calculation errors, such as incorrect additions and subtractions, and errors in applying deductions and credits.
2. Incorrect bank account numbers: Including incorrect or failing to update bank account numbers may cause issues when receiving refunds or payments.
3. Missing or incorrect signatures:Failure to sign the forms or signing them incorrectly may render the return invalid.
4. Errors in the tax marital status: Including incorrect marital status information, such as name or date of birth, may affect the validity of the declaration.
5. Not including necessary information:Failure to include required documents or information, such as W-2 or 1099 forms, may result in audits or fines.
6. Errors in estimating income and expenses: Including incorrect income or expenses can affect the amount of tax you must pay.
7. Do not update the information:Failure to update information in the event of significant changes in your financial situation, such as inheritances or property sales, can cause problems when filing taxes.
8. Do not use tax preparation software:Not using tax preparation software can increase the likelihood of math errors and omissions.
9. Not reviewing the statement:Failure to review your return before submitting it can cause errors and problems with receiving refunds or payments.
10. Not considering credits and deductions: Failure to consider available credits and deductions may increase the amount of tax you must pay.

How to avoid these mistakes

1. Use tax preparation software to help you complete your return.
2. Please review the information several times before submitting the return.
3. Be sure to include all required documents and information.
4. Update information in case of significant changes in the financial situation.
5. Consult a tax professional if you have questions or need assistance.
6. Please verify the accuracy of calculations and information before submitting your return.

Remember that it is important to be accurate and careful when filing your taxes to avoid errors and problems with receiving refunds or payments.