PCT First time user

Hi , I am currently on 300mg a week test E alone, looking to put it up slightly to 450mg a week. It’s my 4th week coming up.

For PCT I have Tamoxifen from MTS, how many should I use?

I was thinking to do:
1st week: 2 tablets a day
2nd week: 1 tablet a day
3-4th week half a tablet to finish off?

That could work. But I would just go with 20mg ed 4-5 weeks