Royalties for Author

Hi I have a small publishing business. Where should I put the Author’s commission everytime a book has been purchased? Sometimes in 1 Invoice has different Books of different authors.

This really is not a question about Manager. It is about how you track sales. You could create Inventory Quantity Movement reports for the various titles and proceed from there. Because the authors are different entities from the book purchasers, their commissions will be entered as separate transactions. So commission payments could be calculated once per month or quarter.

Or, every time a book is purchased, you could immediately enter the related commission. This could be done as a purchase invoice or a cash payment. If the former, you could then settle author accounts payable on a periodic basis. It is up to you.