Il faut que je parle.
I must speak.
Tense guide
Subjunctive present
Use the present subjunctive after expressions of need, doubt, emotion, desire, judgment, or purpose.
When to use it
It usually appears after que: il faut que, bien que, je veux que, pour que, avant que.
How to recognise it
Look for a trigger phrase plus que, then a verb form that may differ from the normal present: que je sois, que nous allions.
How to form it
Often start from the ils/elles present stem and add -e, -es, -e, -ions, -iez, -ent. Nous and vous often look like imperfect forms.
A simple rule
Do not use it just because the sentence is in the future or past. The trigger expression is what matters.
Examples
Je veux que nous partions.
I want us to leave.