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.
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.
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.
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