see this thread (or many others like it)
https://ttlc.intuit.com/community/taxes/discussion/2024-tax-year-import-from-morgan-stanley-tries-to...
I've seen on other threads that what won't work on desktop imports into online version so there is clearly some issue with desktop and import as well as other issues; someone suggests starting your return in online to do the import then moving to desktop which seems a lot of work unless you really need the import.
frankly with 4 weeks to go, if you are still stuck on import then be prepared to go manual and you could probably be done with it today and move on, unless you have a very complicated 1099-B with a lot of adjustment entries. 1099-INT and DIV are easy to input and you have to take care of supplemental tax info (e.g. US Gov obligations, Foreign taxes, accrued interest etc) if those apply to you. 1099-B most people can just input at summary level, if you have any adjustments such as wash sales, AMD or non covered securities those are best input at detailed level to avoid adjusting sales summaries which will trigger a need to mail your 1099-B to IRS.
