can you file several returns in turbo tax?

You can buy the Desktop Download program here or in stores or online like Amazon, Costco, etc.
https://turbotax.intuit.com/personal-taxes/cd-download

Authorized Sellers
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-product-orders/obtain-authentic-turbotax-programs/L1yYfitCw_US_en_US?uid=lv4rnzmq

How to get started with the Desktop program, install and activate it
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/download-software-turbotax-com/L7u9oLEkq_US_en_US?uid=luqgvzrd

Oh and yes,  you can install  Turbo Tax on 5 computers you own and  do unlimited returns and efile 5 for free.  You get 1 free state PROGRAM download.  Then each state return is $25 to efile or you can print and mail state for free.  And you can buy any version.  All the Desktop programs have the same forms, you  just get more help and guidance in the higher versions.