More info is needed bro. But I'll go with the info that is given. How long are you cycling the test and tren?
My reason for asking is that if your cycle looks like this, you will need to start the day after your last injection.
EXAMPLE 1-(IMO this is the best way to do this, your body will react better to this since it will be somewhat like tappering the dose test)
Test e 1-10weeks
Tren a 1-12weeks(you can run the tren 2 weeks after last test inj since it is a short ester and your test is a long ester)
Clomid 12-16weeks @ 50/50/50/50
or
Nolva 12-16weeks @ 40/40/20/20

EXAMPLE 2-But if your cycle looks like this then you will start your pct 2 weeks after your last injection
(You may experience more sides, due to the sudden stop of use of tren without a pct immediately after) If you do not understand why you may experience more sides let me know and I'll try to explain it a bit more in depth.
Test e 1-10weeks
Tren a 1-10weeks
Clomid 12-16weeks 50/50/50/50
OR
Nolva 12-16weeks 40/40/20/20

Hope this helps out...

Kinda odd your running a fast acting ester with the tren and a slow ester with the test. Anyhow isn't clomid needed for PCT with tren since it is a progesterone? That's always been my understanding. The dosing advice for the nolva looks good. I would start the clomid the same day you start the nolva and run 300mg day one 100mg day two and then 50mg for the next two weeks or three weeks. PCT for me always varies depending on how bad my system has been shut down. Are you using an AI or anything for on cycle support? Caber has some serious sides of its own so be careful with that. I usually use formestane for on cycle support, even with tren and it works just fine but to each his own.

Really do not have enough info here, but it sounds like you may not really have enough experience to be running tren bro... but seeing that really never stops anyone : / ...lets try and keep you as safe as possible

Nolva 40/40/20/20 10-14 days after last test jab. i'm of the school that clomid is obsolete but thats not gospel, there are plenty of ppl that still swear by it.

how long is this cycle and why are u using test e and tren a? are you just jumping the tren in mid-cycle? make sure you run your test AT LEAST 2wks longer than tren and hope you have some prami or cabor for tren sides

Don't know the dosage for clomid. But its 2 weeks after your last injection. Nolva 40/40/40/20