I'm unsure how to use quizás to say a statement like "Perhaps I will go to the movies tomorrow."
I've seen quizás used in subjunctive sentences before but I'm not sure how I would phrase/which tense to use when using a statement like this.
Quizás! I was about to suggest that you try to use the word just as in an example from the dictionary here at SpanishDict.com because I expected there to be a good example given.
To my chagrin, no example is given at all! So I will offer you one from my Gran Diccionario Oxford.
quizá, quizás (adverbio) = maybe, perhaps;
Quizá vengan mañana. Maybe or perhaps they'll come tomorrow.
The verb “venir” is expressed in the subjunctive mood: http://www.spanishdict.com/conjugate/venir
You will, however, find a more complete explanation from Lazarus in response to a similar question in this thread: http://www.spanishdict.com/answers/4980/quizs-or-quiz
Lazarus explains that you must use the indicative if quizás follows the verb. Have a look.
Quizá vienen hoy (declaration)
Quizá vengan hoy (non-declaration)
Vienen hoy quizá
You cannot say "Vengan hoy quizá".