I mailed my taxes in, then relized i made an error, where do i go from here?

So I work a regular part-time job and run an LLC with a business partner on the side.
this last tax year I learned about 1099Misc for Contracted work and I thought this was the same form I was meant to use for me.

I realized that actually I needed to fill out a Schedule K-1 and this means I messed up my taxes.  but I regular mailed them in. At this point, it most likely has not reached the IRS, so, I have yet to hear back. That being said. where should I go from here?

Should I wait for my refund then file a 1040X? I got the TurboTax Home & Business edition.
Also as a side note, it's not a lot of money, either way, I just don't want to make a mistake when it comes to my business.