the 7203 is not asking for shares it's asking for block number (not the number of shares) - leave blank or enter 1 for each of you since this is an LLC that evidently elected to be taxed as an S-Corporation it's unlikely that state law would require shares to be issued. but that's a legal question.
the instructions for the 7203 doesn't address the issue of an LLC that elected to be taxed as an S-Corp but under state law is not required to actually issue stock.
this is all the instructions say
Stock block. When a
shareholder has a different
basis in different blocks of
stock, pass-through items are
generally allocated pro rata to all
shares, regardless of their different
bases. If there is a partial stock sale or
partial redemption, you may file more
than one form and provide a
description of what period the form
covers. See Regulations section
1.1367-1(b)(2) and (c)(3) for details.
