K1 not received - Do I file and amend OR file for extension

[Nabeel_TT]

I have a small real estate (crowd) investment. The company did give me an "estimate" that shows Line 4B and Line 13. 

My question is

1) should I file taxes with the estimate and then amend later if I need to? OR

2) file for extension ?

3) do something else?

I am using Turbo Tax 2020 software 

[fanfare]

If you are waiting for tax documents, file form 4868 to get a filing extension.

NOTE: once you e-File, you only get one 1040-X e-File to correct any errors.