simple question, no answer
Here's a FAQ: How do I import my 1099s?
See this TurboTax support FAQ for My Docs - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/upload-documents-docstm/L8811RaLW_US_en_US?uid=m91sbsw4
Or are you referring to importing a tax form such as a W-2 or a Form 1099? If so, see these TurboTax support FAQs -
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/import-enter-w-2/L55HzdeDr_US_en_US?uid=m91sdhuz
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/import-1099s/L2hPcduMb_US_en_US?uid=m91se1qu