The symbol ™ is used to provide notice of a claim of common-law rights in a trademark. A ™ usually is used in connection with an unregistered mark, to inform potential infringers that a term, slogan, logo or other indicator is being claimed as a trademark.
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However, The symbol ® is a notice of registered ownership used in many countries or regions to advise the public that a trademark or service mark is registered and to provide constructive notice of the legal ownership status of the mark with which it is used.
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If your trade mark is unregistered, you cannot use the ® symbol, but you may use the ™ symbol. Using the ® symbol with an unregistered trade mark is a criminal offence.
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Therefore, you can add TM next to your mark and once registered you can add the symbol ®

To know more read: Startup Series Part 1: Intellectual Property