Your 2018 tax return cannot be Form 1040A. There is no Form 1040A for 2018. All 2018 tax returns are filed on Form 1040. See the FAQ at the following link for instructions to print a copy of a 2018 tax return that you filed with the CD/Download TurboTax software.
https://ttlc.intuit.com/questions/1914216-how-do-i-print-a-copy-of-my-return-filed-in-the-turbotax-c...
