I Uploaded Rent Certificate, but not included in return?

There is a specific place to attach the rent certificate PDF when e-filing.

Upload or mail the needed PDF directly. See Schedule H & H-EZ Instructions, page 5:

When you file electronically, within 48 hours after receiving your Wisconsin acknowledgment you must send all of the required Schedule H or H-EZ attachments along with a completed Form W-RA, Required Attachments for Electronic Filing.

You may either mail the form and attachments to the address listed in the Form W-RA instructions or attach them electronically at https://tap.revenue.wi.gov/WRA/.

For additional information, see the department’s website at revenue.wi.gov or contact any department office.

For more information, see: 

Claiming the Wisconsin Homestead Credit, question and answers 2 and 9.

For your future reference, see: Attaching PDF to claim Wisconsin Homestead Credit.

I used TurboTax for my 2020 taxes they did not receive my rent credit certificate so I am trying to file that now

@Margie mills  What do you mean "file that now?"   You cannot put a 2020 tax document on a 2021 tax return.   If you did not include your 2020 rent document when you filed your 2020 tax return you need to amend your 2020 state return.

To Amend a State Return:  https://ttlc.intuit.com/questions/2824532-i-need-to-amend-my-state-return