Oh so you are not looking for software to import into Turbo Tax? You are trying to develop one? Oh and it depends on what version you will be importing to....like the Turbo Tax Online web version or the Desktop installed program (and Windows or Mac)
Turbo Tax mainly imports from Quicken and QuickBooks. Here's some FAQ on those,
Importing Quicken to Turbo Tax CD/Download Software
<a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/questions/2579307-how-do-i-import-directly-from-quicken">https://ttlc.intuit...>
Here's a Quicken article on transferring to Turbo Tax
<a rel="nofollow" target="_blank" href="
https://www.quicken.com/support/how-transfer-tax-information-quicken-turbotax">https://www.quicken.c...>
How to assign Tax Form line items to a Category
<a rel="nofollow" target="_blank" href="
https://www.quicken.com/support/how-assign-tax-form-line-items-category">https://www.quicken.com/sup...>
Here's a FAQ about importing .txf files. So if you can make a .txf you might get something,
<a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/questions/1899278-how-do-i-import-from-the-txf-file">https://ttlc.intuit.com...>
