If an individual taxpayer has substantial business losses, unfavorable federal income tax rules can potentially come into play. Here’s what you need to know as you assess your 2024 tax situation. Disallowance rule The tax rules can get complicated if your business or rental activity throws off a tax loss — and many do during the early years. First, the passive activity loss (PAL) rules may apply if you aren’t very involved in the business or if it’s a rental activity. The PAL rules generally only allow you to deduct passive losses to the extent you have passive income from other sources. However, you can deduct passive losses that have been disallowed in previous years (called suspended PALs) when you sell the activity or property that produced...