I can't answer what you should do now, but I want to comment on what you should have been doing in the past.
An LLC with 2 members is a partnership and should file a partnership return form 1065. The partnership return will generate a K-1 statement for each partner that goes on the partner's personal return.
If and only if the two partners are spouses and they live in a community property state, they can choose to file the business as 2 schedule C businesses, one in the name of each spouse, with each schedule C reporting half the income and expenses, regardless of how the work was actually divided. (It's not clear to me that this is an option, it may be a requirement. You would want an expert to double check the exact wording of the IRS ruling.) See below.
So if you don't live in a community property state, you should be filing a 1065, and then your personal return would contain 2 K-1s and a single schedule C for your single member LLC. If you live in a community property state, your past year tax return (and your upcoming 2022 return) should include 3 Schedule Cs, or 2 K-1s and 1 schedule C for the SMLLC. If
If this is not what you have been doing, you may need professional help to file the correct amended returns and ask for a penalty waiver. The penalty for late filing a 1065 is $200 per member per month, and the 1065 is due March 15, not April 15.
The partnership is automatically classified as a partnership for tax purposes unless you file the form. As for the benefits and detriments of treating the business as an S-corp, I leave that for others.
