I didn't see about transferring from TaxAct. Depends what you can get from them. A pdf? Here's some links
How to transfer into Windows Desktop
https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-fo...
How to transfer into Mac Desktop
https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-t...
Transfer a non Turbo Tax pdf to Mac Desktop program
https://ttlc.intuit.com/community/entering-importing/help/can-i-transfer-from-a-pdf-to-turbotax-for-...
How to transfer into the Online version
https://ttlc.intuit.com/community/entering-importing/help/how-do-i-transfer-last-year-s-return-into-...
