The documents you need depend on your individual circumstances, but generally include W-2s from employers, 1099s for other income such as interest, dividends or self-employment, and records of any deductions or credits you plan to claim.

The deadline for filing a personal tax return in the U.S is typically April 15th. However, if this date falls on a weekend or holiday, the deadline may be extended to the next business day.

It's generally recommended to keep copies of your tax returns and all supporting documents for at least three years. This is the period of time during which the IRS can initiate audits for incorrect returns. However, in cases of fraud or failure to file a return, the IRS can request information indefinitely.

https://sa.www4.irs.gov/wmr/