If you need to delete Form 1099-MISC, please review the following TurboTax FAQ for more information:
https://ttlc.intuit.com/replies/4233655
If you need to delete a different Form 1099, please try following the same instructions but Search for the relevant form first, such as 1099-g, 1099-b, 1099-r, etc.
If you still cannot delete the form, please review the following TurboTax FAQ for more information:
https://ttlc.intuit.com/replies/3288508