I already files my 2021 taxes. But went off my pay stub and got my W2 and I put to much it was 1700.00 less. What should I do

[DoninGA]

You will have to wait for the IRS to either Accept or Reject your filed federal tax return.
If the return is rejected you can make the necessary changes and e-file again.
If the return is accepted you will have to amend your original tax return. An amended return, Form 1040-X, can only be printed and mailed to the IRS if the original tax return was not e-filed. The IRS will take up to 16 weeks or longer to process an amended tax return.

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

The federal amended tax return, Form 1040-X, for tax year 2021 will not be available until 02/24/2022

[VolvoGirl]

That's why we tell people not to use their paystubs and not to file early.   Wait for the W2.   It usually does not match your paystubs.   There are many items that can affect it.   And you don't know the proper codes for deductions.