From any page of the Tally site, select the "connect wallet" button in the top right corner.
On the pop up window, select your preferred wallet service. Currently Metamask, Ledger, and WalletConnect are supported. Hardware wallet users can also connect their device through Metamask.
Follow the prompts to complete the wallet connection process. You will then see your connected wallet in the top right corner of the site.
Connecting your wallet allows you to delegate your voting power or vote on active proposals through the Tally site.