Estate planning
Annual exclusions, lifetime exemptions, and how forgiveness interacts with both.
Families that lend should understand three numbers: the annual gift-tax exclusion (what you can give each recipient per year with no filing), the lifetime exemption (the larger cumulative amount), and the AFR that keeps a loan from being treated as a gift in the first place.
These interact in useful ways. A loan can fund a need today, and the lender can then forgive part of the balance each year within the annual exclusion - transferring wealth gradually and tax-efficiently. Tracking it all is the hard part, which is precisely what software should handle.
See how Pari structures family lending.