Like Bill said, use the RLA [Running Load Amperes] to figure your KVA on each unit.
On large and/or multistage heatpumps, figure them to be LCLs [Long-Continuous Loads], so figure the RLA at 120% [or derate the circuit by 80% - but no need to do both]. If you know that they will not run for 3 hours + continuously, then LCL is not required. Heatpumps normally run at least 4 hours continuously at some time of the year, so best to figure LCL in your calcs.
List this on your Panel Schedule [with LCL added] for each heatpump.
List the heatpumps on a Load Calc as the NEC shows in the examples given at the end of the book, or in Article 220.
For LRA [Locked Rotor Amps], or starting amperes, there should be a rating on the nameplate stating what it should be calc'd at - but if that's not available, figure 600% of FLA for a somewhat close "Hip Shot"
Use the rated FLA of all motors per HP, not the RLA, when doing the 600% thingee.
Apply the LRA to your SCA [Short Circuit Amperes] calcs for motor contribution.
Sorry to throw so many TLA's at 'ya!!
[TLA = Three - Letter Acronyms].
Nothing like being bombarded with abbreviations!!