You will want to start off on the 2017 business return and work forward from there. Please click here to access the 2017 TurboTax Business download. After you do the 2017 business return, start on your 2017 personal 1040 and state return (if applicable). After your 2017 business and personal returns are done, repeat the process for 2018 and 2019.
This can be a very involved process, so you may want to contact a local tax pro in your area.
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