Learn Portuguese (Portugal): Lamento que tu tenhas feito o levantamento desse montante. - I regret that you have made the withdrawal of that amount.

The verb lamentar (to regret) expresses an emotion, which triggers the subjunctive. We need the Perfect Subjunctive (tenhas feito) rather than the Present Subjunctive (faças) because the withdrawal already happened in the past, but the feeling of regret is happening right now in the present.

How exactly is tenhas feito formed?

It combines the Present Subjunctive of the helper verb ter (which is tenhas for tu) with the past participle of the action verb. Here, the action is fazer (to do/make), which has the irregular past participle feito.

Could I use the verb levantar directly instead of saying fazer o levantamento?

Yes! Fazer o levantamento sounds a bit formal, like making a withdrawal at a bank. You could absolutely just use the verb levantar (to withdraw) and say Lamento que tu tenhas levantado esse montante, which means the exact same thing.

Why use desse instead of daquele to say of that?