By default, Windows Terminal doesn't have any default key-board short-cuts for dealing with tabs (creating a new tab, closing a tab, switching between tabs). However, you can create custom short-cuts fairly easily. Ther'es a "keybindings" section (towards the end of the file) where you can define your custom keybinding.
Here's the code snippet from my profiles.json file for the the custom short-cuts:
// Add any keybinding overrides to this array.
// To unbind a default keybinding, set the command to "unbound"
"keybindings": [{
"command": "closeTab",
"keys": "ctrl+W"
},
{
"command": "newTab",
"keys": "ctrl+T"
},
{
"command": "nextTab",
"keys": "ctrl+tab"
},
{
"command": "prevTab",
"keys": "ctrl+shift+tab"
},
{
"command": "paste",
"keys": "ctrl+V"
}]
You can find the complete list of supported short-cut actions in the schema definition for profiles.json here: https://aka.ms/terminal-profiles-schema.