basmanden

[icy field]

Please be patient

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[reef pike]

My first thought would be to translate literally from English ie. passé composé, dès que je suis rentrée, but im curious to know as well

[elfin crown]

Yes you must use the future tense or the futur antérieur.

Dès que je rentrerai - As soon as I return
Dès que je serai rentré(e) - As soon as I've returned (As soon as I'm home)

[shadow plank]

I didn’t know futur antérieur was a thing! Thanks

[covert basalt]

It's also possible to use the present tense:
dès que je rentre, je t'appelle
dès que je suis rentré, je t'appelle

I'd say the future tense is stylistically preferred in any case

[dense oar]

It depends on the main clause, no? In your example, the main clause is in the present (je t’appelle) so the subordinate clause introduced by « dès que » should be in a tense to the past of the tense in the main clause, which would be the passé composé.
If I had a sentence like « Dès que je suis rentré, je t’appellerai », it wouldn’t work since the passé composé is two tenses away from the main clause.