Regarding the formal diet, you need to be on the exclusion diet for 8 weeks before attempting to reintroduce foods. This takes about one year to do properly. You will still experience unexplained flare ups. I would not suggest attempting the fodmap diet in the UK without speaking to a nutritionist first. You will need a go referral.
The AMT is the excess of the tentative minimum tax over the regular tax. Thus, the AMT is owed only if the tentative minimum tax is greater than the regular tax. The tentative minimum tax is figured separately from the regular tax. In general, compute the tentative minimum tax by:
Because the AMT disallows the state and local tax deduction and dependent exemptions, families with children who live in high-tax states are among the most likely to owe AMT. Allowing the state and local tax deduction and dependent exemptions for AMT purposes would reduce the number of households affected by the AMT from 4.8 million to just 525,000 in 2017.