Add tags to community events submission form. Add this to the end of the modules/taxonomy.php template.

taxonomy.php

<?php

$tags_string = '';
if ( isset($_POST['tax_input']) && isset($_POST['tax_input']['post_tag']) ) {
	$tags_string = $_POST['tax_input']['post_tag'];
} elseif ( get_post() && get_the_ID() ) { // is there a current post?
	$current_tags = get_the_terms(get_the_ID(), 'post_tag');
	$current_tags = wp_list_pluck( $current_tags, 'name' );
	$tags_string = implode(', ', $current_tags);
}

?>
<div class="tribe-events-community-details eventForm bubble" id="event_tag">
	<table class="tribe-community-event-info" cellspacing="0" cellpadding="0">
		<tr>
			<td colspan="2" class="tribe_sectionheader">
				<h4>Event Tags:</h4>
			</td>
		</tr>
		<tr>
			<td colspan="2">
				<input type="text" id="event-tags" name="tax_input[post_tag]" size="40" value="<?php esc_attr_e($tags_string); ?>" />
				<small>Separate tags with commas</small>
			</td>
		</tr>
	</table>
</div>