I sold my farm in 2018 thei took deductions at deprecation so where do I put that amount on my return

As I understand it, you sold your farm in 2018, and you have additional expenses that were not posted to the return.  In that case you would have to amend the 2018 tax return.

If you've filed your return and need to add additional information, then you will have to prepare an amended return in TurboTax.

If you used TurboTax Online, simply log in to your account and select “Amend a return that was filed and accepted.” 

If you used our CD/download product, sign back into your return and select “Amend a filed return.” You must file a separate Form 1040X for each tax return you are amending.

Amend ONLINE    OR     Amend CD/Download       Amend 2016 - 2019

You will have to mail the amended return.  The IRS limits the system to only one Social Security number or Tax ID  to be E-Filed.  This is to guard against fraudulent tax returns.