I don't know how IFR fuel planning got so difficult but here's one one way.
1. Time & Fuel to destination
2. Time & Fuel for approach
3. Time & Fuel to Alternate
4. Time & Fuel for approach at Alt:
5. 45 Min FAA reserve
6. FAA Required fuel (the sum of 1-5)
7. Time and fuel for Holding (known delays)
8. Extra or Contingency fuel
9. Total fuel (Sum of 6-8)
Number 6 is the fuel required by CFR 91.167***
Number 7 is used to account for any known delays.
Number 8 is used for my personal minimums.
Number 9 is my planned take off fuel.
If you are using an EFB for flight planning, the program may hide some of this info in different places or calculate it as you think it should.
So in my 182 you may see me have something written out like this for a trip from JVL to EAU with an Alternate of LSE.
1. Time & Fuel to destination 1+40 21.7
2. Time & Fuel for approach +15 3.5
3. Time & Fuel to Alternate +26 6.0
4. Time & Fuel for approach at Alt: +15 3.5
5. 45 Min FAA reserve +45 10.5
6. FAA Required fuel (the sum of 1-5) 2+36 45.2
7. Time and fuel for Holding (known delays) 0 0
8. Extra or Contingency fuel +45 10.5
9. Total fuel (Sum of 6-8) 3+21 55.7
***Per an FAA legal interpretation fuel for the approach is required to be added.