The active voice and passive voice
The original sentence is like:

His sales accounts for most of the total sales of the company.

Can I change it into passive voice like this:
Most of the total sales of the company is accounted from his sales.

Many thanks.

Question

The active voice and passive voice
The original sentence is like:

His sales accounts for most of the total sales of the company.

Can I change it into passive voice like this:
Most of the total sales of the company is accounted from his sales.

Many thanks.

Answer

In my opinion you can’t. “Account for” is a phrasal verb and follows a fixed pattern.

Also, I would write “His sales ACCOUNT (no “s”) for most of the total sales of the company”, since “sales” is plural.

Answer

You could also restate to the following: "The majority of the company's total sales is derived from his contribution to the same."